The Office of Homeland Security and the White House has issued the following easily identifiable reading list for watchful librarians, etc. to use to identify terrorist suspects in your community.

http://www.whitehouse.org/homeland/reading.asp

And don't forget, you can find the downloadable, printable Operation TIPS Anonymous Lead Forms here at the White House website for ease of reporting:

http://www.whitehouse.org/homeland/reading.asp